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| author | Ingo Molnar <mingo@kernel.org> | 2016-01-29 09:41:18 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-01-29 09:41:18 +0100 |
| commit | 76b36fa896a2db64582690e085f36adc76604134 (patch) | |
| tree | 78007f123ead6f96cdee6ba98ac3c289c706cc39 /arch/x86/entry | |
| parent | 14365449b6ce34cf6a3040ff8ebbb39d89d67159 (diff) | |
| parent | 92e963f50fc74041b5e9e744c330dca48e04f08d (diff) | |
| download | op-kernel-dev-76b36fa896a2db64582690e085f36adc76604134.zip op-kernel-dev-76b36fa896a2db64582690e085f36adc76604134.tar.gz | |
Merge tag 'v4.5-rc1' into x86/asm, to refresh the branch before merging new changes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/entry')
| -rw-r--r-- | arch/x86/entry/syscalls/syscall_32.tbl | 1 | ||||
| -rw-r--r-- | arch/x86/entry/syscalls/syscall_64.tbl | 1 | ||||
| -rw-r--r-- | arch/x86/entry/vdso/Makefile | 1 | ||||
| -rw-r--r-- | arch/x86/entry/vdso/vclock_gettime.c | 12 |
4 files changed, 9 insertions, 6 deletions
diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl index f17705e..cb713df 100644 --- a/arch/x86/entry/syscalls/syscall_32.tbl +++ b/arch/x86/entry/syscalls/syscall_32.tbl @@ -383,3 +383,4 @@ 374 i386 userfaultfd sys_userfaultfd 375 i386 membarrier sys_membarrier 376 i386 mlock2 sys_mlock2 +377 i386 copy_file_range sys_copy_file_range diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl index 314a90b..dc1040a 100644 --- a/arch/x86/entry/syscalls/syscall_64.tbl +++ b/arch/x86/entry/syscalls/syscall_64.tbl @@ -332,6 +332,7 @@ 323 common userfaultfd sys_userfaultfd 324 common membarrier sys_membarrier 325 common mlock2 sys_mlock2 +326 common copy_file_range sys_copy_file_range # # x32-specific system call numbers start at 512 to avoid cache impact diff --git a/arch/x86/entry/vdso/Makefile b/arch/x86/entry/vdso/Makefile index 265c0ed..c854541 100644 --- a/arch/x86/entry/vdso/Makefile +++ b/arch/x86/entry/vdso/Makefile @@ -4,6 +4,7 @@ KBUILD_CFLAGS += $(DISABLE_LTO) KASAN_SANITIZE := n +UBSAN_SANITIZE := n VDSO64-$(CONFIG_X86_64) := y VDSOX32-$(CONFIG_X86_X32_ABI) := y diff --git a/arch/x86/entry/vdso/vclock_gettime.c b/arch/x86/entry/vdso/vclock_gettime.c index 8602f06..1a50e09 100644 --- a/arch/x86/entry/vdso/vclock_gettime.c +++ b/arch/x86/entry/vdso/vclock_gettime.c @@ -126,23 +126,23 @@ static notrace cycle_t vread_pvclock(int *mode) * * On Xen, we don't appear to have that guarantee, but Xen still * supplies a valid seqlock using the version field. - + * * We only do pvclock vdso timing at all if * PVCLOCK_TSC_STABLE_BIT is set, and we interpret that bit to * mean that all vCPUs have matching pvti and that the TSC is * synced, so we can just look at vCPU 0's pvti. */ - if (unlikely(!(pvti->flags & PVCLOCK_TSC_STABLE_BIT))) { - *mode = VCLOCK_NONE; - return 0; - } - do { version = pvti->version; smp_rmb(); + if (unlikely(!(pvti->flags & PVCLOCK_TSC_STABLE_BIT))) { + *mode = VCLOCK_NONE; + return 0; + } + tsc = rdtsc_ordered(); pvti_tsc_to_system_mul = pvti->tsc_to_system_mul; pvti_tsc_shift = pvti->tsc_shift; |
